Question

Jason leaves Detroit at 4:00 PM and drives at a constant speed west along I-94. He passes Ann Arbor, 40 mi from Detroit, at 4:40 PM. (a) Express the distance d traveled in terms of the time t (in hours) elapsed. d(t)

Answer 1

4:48 minus 4:00 = 48 min
Time in hours is +48%2F60+=+4%2F5++ hrs
+40+=+r%2A%284%2F5+%29+
+r+=+%285%2F4%29%2A40+
+r+=+50+ mi/hr
+40+=+50%2A%284%2F5%29+